From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Electrical experimental record sheet for testing tungsten contact points.
| Identifier | ExFiles\Box 35\6\ scan 342 | |
| Date | 19th April 1926 | |
| X2894 ELECTRICAL EXPERIMENTAL RECORD SHEETS X.&No:- 2894 Tungsten contact points Date on. | Location. | Date off. | REMARKS. | Miles reading start. | Miles reading finish. | Miles covered. | Total miles. --- 5-11-26 | 9GIII | | Fitted to 9GIII. with old std coil and standard ballast. Condition V.{VIENNA} Fair | 5782 | | | 7-12-26 | " | | | | 6733 | 951 | 951 20-1-27 | " | | | | 8286 | 1553 | 2504 2-2-27 | " | | Fair-only bedding 53% | | 9032 | 746 | 3250 2-3-27 | " | | Speedometer changed | 0000 | 9912 | 880 | 4130 4-4-27 | " | | | | 1200 | 1200 | 5330 2-5-27 | " | | | | 2384 | 1184 | 6514 16-5-27 | " | | Trimmed and reset. Condition V.{VIENNA} Fair. | | 3487 | 1103 | 7617 5-10-27 | " | 20-10-27 | Removed from engine | | 5723 | 2236 | 9853 20-10-27 | Lab. | | and returned to lab. | | 5907 | 184 | 10,037 19.4.26. | ||